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5. If the sun sets, it gets dark.
6. If you mix red and blue, you get purple.
7. If students study hard, they get good grades.
8. If it rains, the ground gets wet.
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9. If cats are hungry, they meow.
10. If you press this button, the computer turns on.
11. If babies are tired, they cry.
12. If you freeze water, it becomes ice.
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13. If you drop glass, it breaks.
14. If you eat too fast, you get a stomachache.
15. If dogs see strangers, they bark.
16. If the wind blows hard, trees move.
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17. If you don't sleep well, you feel tired.
18. If you brush your teeth, they don't decay.
19. If people have oxygen, they don't die.
20. If iron gets wet, it rusts.
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